MJAS

Manuscript Details

Nutrient Content and In-vitro Digestibility of Potato Waste Fermented with Saccharomyces cerevisiae

Muhammad, S.A., Hazwani Izzati, H., Suyub, I.B., Nobilly, F. & Yaakub, H.*

Department of Animal Science, Faculty of Agriculture, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia

Malaysian J. Anim. Sci. 2023 26(1): 11-17

Click to view the abstract

A study was carried out to evaluate the effects of Saccharomyces cerevisiae on fermenting potato waste (PW), and the in-vitro digestibility of the fermented potato via gas production. Potato waste was assigned to three treatments: PW plus zero media (P0), PW plus 5 % sugar solution (PS) and PW + 5 % sugar solution + yeast (PSY); the treatments were replicated six times and fermented for 0, 24, 48, 72 and 96 hours in a two-factor factorial design (CRD) factorial. Because of higher crude protein, ether extract and lower crude fibre contents, fermented PW at 72 hours was used for the in-vitro gas production for determination of metabolizable energy (ME), in-vitro dry matter digestibility (IVDMD) and in-vitro organic matter digestibility (IVOMD). The results of PW fermentation over time revealed that there was no interaction (P>0.05) between treatments and the time of fermentation, hence main factors were separately analysed. The dry matter (DM), crude protein (CP) and ether extract (EE) of PSY were significantly (P<0.05) higher than values across P0 and PS. The proximate values and fibre components were highest (P<0.05) at 72 hours of fermentation. Similarly, the in-vitro gas produced by PSY at 2h was highest (P<0.05) across treatments. However, no difference (P>0.05) was observed during the remaining incubation periods. The IVDMD and IVOMD digestibility of P0, PS and PSY were similar (P>0.05). It was therefore concluded that inoculating potato waste with Saccharomyces cerevisiae and fermented for 72 hours improved nutrient contents and digestibility.